Star · M3III
2 Her
2 Her is a giant star of spectral type M3III in the constellation Hercules, 750.0 light-years from the Sun.
| Other names | HIP 77907 |
|---|---|
| Constellation | Hercules |
| Distance | 750.0 light-years (229.9 pc) |
| Apparent magnitude | magnitude 5.35 |
| Absolute magnitude | magnitude −1.46 |
| Spectral type | M3III |
| Surface temperature | 3,590 K |
| Luminosity | 1,630 L☉ |
| Radius | 104 R☉ |
| Mass | 7.51 M☉ (estimated) |
| Right ascension (J2000) | 15h 54m 37.9s |
| Declination (J2000) | +43° 08′ 19″ |
| Space velocity (relative to the Sun) | 81.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.35). Visible from the whole Northern Hemisphere and south to latitude 47° S. North of latitude 47° N it never sets. It stands highest at midnight in May, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1276. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 13 million years.
The Sun seen from there
From a planet around 2 Her, the Sun would look like a star of magnitude 11.64, in the direction where our sky has the constellation Eridanus. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.